java.lang.NoClassDefFoundError: org/apache/http/client/ClientProtocolException

[HommeDeJava]

Greetings folks,

I would like to share something I've found about the potential
conflict between AppEngine config in Eclipse GWT plugin and use of
HttpClient code in your server for instance to build a proxy server.

I've already known about constraints of AppEngine on server but I've
forgot to disable AppEngine in my Eclipse project.

If you encounter such error messages as «
java.lang.NoClassDefFoundError: org/apache/http/client/
ClientProtocolException » although all the respective libraries are
included so you should try to remove AppEngine from your classpath or
disable AppEngine use via properties settings of your Eclipse
project.

Hoping this can help someone